[
    {
        "col_one": 1,
        "col_two": -1,
        "col_three": 0.1,
        "col_four": "A"
    },
    {
        "col_one": 2,
        "col_two": -2,
        "col_three": 0.2,
        "col_four": "B"
    },
    {
        "col_one": 3,
        "col_two": -3,
        "col_three": 0.3,
        "col_four": "C"
    }
]